Anyone notice on the 06 HCH that in Auto it will adjust recirculate or fresh if the outside is cooler than the inside?

Usually I like fresh air even if it's really hot out but I found out hitting the fresh button takes it off Auto. Well this is my first car with climate control vs low/med/hi so I dealt with the recirc until this morning when I noticed it had switched itself to fresh since outside temp was lower than inside.